Business presentation method, cross-business presentation device, and business system

The invention provides a business presentation method, a cross-business presentation device, and a business system. The business presentation method includes that: a cross-business presentation unit receives a business presentation request transmitted by a first business system, wherein the business presentation request includes a first client terminal mark and a first business mark which are in correspondence with a first business, and presented second business content information; the cross-business presentation unit determines that a second business is opened by a second client terminal which is associated with the first client terminal and that the type of the first business is the same with the type of the second business according to the first client terminal mark, the first business mark, and the presented second business content information; the cross-business presentation unit sends the second business content information to the second business system to enable the second client terminal to use the s